Memory expansion - Inspiron AIO 5490

Question

Hi,

As I was looking at the setup guide, I noticed that 24 GB (16 GB + 8 GB) is not among the configurations supported.

• 4 GB DDR4 at 2666 MHz (1 x 4 GB)
• 8 GB DDR4 at 2666 MHz (2 x 4 GB)
• 12 GB DDR4 at 2666 MHz (1 x 4 GB + 1 x 8 GB)
• 16 GB DDR4 at 2666 MHz (2 x 8 GB or 1 x 16 GB)
• 32 GB DDR4 at 2666 MHz (2 x 16 GB)

Could anyone please explain me why?

Thanks in advance.

RoHe · Accepted Answer

If it's not listed, Dell probably didn't test 24 GB of RAM, but that doesn't necessarily mean it won't work.

Keep in mind, it's always better to install RAM in matched pairs so RAM runs in dual-channel mode. With mismatched RAM modules, assuming all the sticks are compatible, RAM will run in single-channel mode which is somewhat slower and less efficient than dual-channel mode.

Mary G · Answer

Maybe because Optane Memory is used.

Intel Optane "memory" is a misnomer. ... Optane memory isn't a random-access computer memory, or RAM. Instead, it's meant to work as a cache memory bridge between RAM and storage, allowing for faster data transfer between the memory, storage, and processor.

aacury · Answer

So...what would happen, then? Wouldn't it work at all or would the system just use some amount of it?

aacury · Answer

Hi, @Mary G  I’m still wondering whether 24GB of RAM will work or not.  Any ideas?

aacury · Answer

Alright! Thanks

Inspiron Desktops

Memory expansion - Inspiron AIO 5490

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